Download or read book A Generalized Model Study of Scour Around Bridge Piers and Abutments written by Emmett M. Laursen and published by . This book was released on 1953 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Four classes of variables are apparent in the problem of scour around bridge piers and abutments--geometry of piers and abutments, stream-flow characteristics, sediment characteristics, and geometry of site. The laboratory investigation, from its inception, has been divided into four phases based on these classes. In each phase the variables in three of the classes are held constant and those in the pertinent class are varied. To date, the first three phases have been studied. Typical scour bole patterns related to the geometry of the pier or abutment have been found. For equilibrium conditions of scour with uniform sand, the velocity of flow and the sand size do not appear to have any measurable effects on the depth of scour. This result is especially encouraging in the search for correlation between model and prototype since it would indicate that, primarily, only the depth of flow might be involved in the scale effect. The technique of model testing has been simplified, therefore, because rate of sediment transportation does not need to be scaled. Prior to the establishment of equilibrium conditions, however, depths of scour in excess of those for equilibrium conditions have been found. A concept of active scour as an imbalance between sediment transport capacity and rate of sediment supply has been used to explain the laboratory observations.

Download or read book Report No FHWA RD written by United States. Federal Highway Administration. Offices of Research and Development and published by . This book was released on 1980 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scour Around Bridge Piers on Streams in Arkansas written by Rodney E. Southard and published by . This book was released on 1993 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Mechanics of Scour in the Marine Environment written by B. Mutlu Sumer and published by World Scientific. This book was released on 2002 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: Treats the subject of local sour around different kinds of marine structures, exposed to waves and/or currents.

Download or read book NBS Special Publication written by and published by . This book was released on 1954 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pilot Study Collection of Bridge scour Data written by Robert D. Jarrett and published by . This book was released on 1987 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scour Around Bridge Piers written by Gordon R. Hopkins and published by . This book was released on 1975 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Enhanced Abutment Scour Studies for Compound Channels written by Terry W. Sturm and published by DIANE Publishing. This book was released on 2004 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental results and analyses are given in this report on bridge abutment scour in compound channels. Experiments were conducted in a laboratory flume with a cross section consisting of a wide floodplain adjacent to a main channel. The embankment length, discharge, sediment size, and abutment shape were varied, and the resulting equilibrium scour depths were measured. Water-surface profiles, velocities, and scour-hole contours were also measured. In the report, a methodology is developed for estimating abutment scour that takes into account the redistribution of discharge in the bridge contraction, abutment shape, sediment size, and tailwater depth. The independant variables in the proposed scour formula are evaluated at the approach-channel cross section and can be obtained froma one-dimensional water-surface profile computer program such as the Water-Surface Profile Program (WSPRO). The proposed scour evaluation procedure is outlined and illustrated, including consideration of the time required to reach equilibrium scour. The proposed methodology is applied to two cases of measured scour in the field.

Download or read book Scour Around Bridge Piers written by Gordon Ray Hopkins and published by . This book was released on 1980 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Available theories and prediction formulas on scour at bridge waterways are reviewed. Formulas that offer potential for prediction of scour around bridge piers are compared by reducing each formula to a non-dimensional form that includes Froude Number, the ratio of scour depth to pier width, and the ratio of stage to pier width. A field study to gather data on scour and related variables is described. The study is aimed at collecting field data in order to furnish a basis on which to compare scour prediction formulas.

Download or read book Pilot Study for Collection of Bridge scour Data written by Robert D. Jarrett and published by . This book was released on 1986 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydraulic Research in the United States written by and published by . This book was released on 1962 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water resources Investigations Report written by and published by . This book was released on 2001 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book University of Iowa Studies in Engineering written by and published by . This book was released on 1949 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Current Hydraulic Laboratory Research in the United States written by and published by . This book was released on 1962 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scouring written by H.N.C. Breusers and published by CRC Press. This book was released on 2020-08-13 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information and technical data concerning scouring/erosion caused by water fl in rivers and streams. More specifically, how certain structures exaggerate this natural process by restricting water flow, causing constriction and loc scour. Material presented is from both field studies and laboratories

Download or read book Report written by United States. National Bureau of Standards and published by . This book was released on 1959 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Notes on Hydrologic Activities written by United States. Inter-agency Committee on Water Resources and published by . This book was released on 1954 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: